SiYuan vulnerable to arbitrary file read
Priority MEDIUM 41CWE-22Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and GitHub.
Summary
SiYuan is a personal knowledge management system. In versions prior to 3.5.4, the markdown feature allows unrestricted server side html-rendering which allows arbitrary file read (LFD). Version 3.5.4 fixes the issue.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0062 49th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed siyuan (siyuan-note): 3.5.4github.com/siyuan-note/siyuan/kernel (Go): 0.0.0-20260118092326-b2274baba2e1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| siyuan-note | siyuan | before 3.5.4 | 3.5.4 | Patch available | CNA |
| — | github.com/siyuan-note/siyuan/kernel (Go) | before 0.0.0-20260118092326-b2274baba2e1 | 0.0.0-20260118092326-b2274baba2e1 | Patch available | GHSA-cv54-7wv7-qxcw |
- siyuan Vendorsiyuan-note Affected before 3.5.4 Fixed in 3.5.4 Patch available CNA
- github.com/siyuan-note/siyuan/kernel (Go) Vendor— Affected before 0.0.0-20260118092326-b2274baba2e1 Fixed in 0.0.0-20260118092326-b2274baba2e1 Patch available GHSA-cv54-7wv7-qxcw
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* | before 3.5.4 | Vulnerable | siyuan-note |
- cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* Versions before 3.5.4 Vulnerable ·siyuan-note
Remediation
- Fix · CNA siyuan (siyuan-note) Fixed in 3.5.4
- Fix · GHSA-cv54-7wv7-qxcw github.com/siyuan-note/siyuan/kernel (Go) Fixed in 0.0.0-20260118092326-b2274baba2e1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-23850
- 2026-10-03 Alias added: GHSA-cv54-7wv7-qxcw
References
Patch 3
More siyuan-note Siyuan vulnerabilities
- TI-2026-26050 SiYuan has directory traversal within its publishing service CVSS 3.1CRITICAL 9.8
- TI-2026-25256 SiYuan: Authorization Bypass Allows Arbitrary SQL Execution via Search API CVSS 3.1CRITICAL 9.8
- TI-2024-35827 A SQL injection vulnerability was discovered in Siyuan 3.1.11 in /getHistoryItems. CVSS 3.1CRITICAL 9.8
- TI-2024-35826 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the ids array parameter in /batchGetBlockAttrs. CVSS 3.1CRITICAL 9.8
- TI-2024-35825 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the id parameter at /getAssetContent. CVSS 3.1CRITICAL 9.8
- TI-2024-35824 A SQL injection vulnerability has been identified in Siyuan 3.1.11 via the notebook parameter in /searchHistory. CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-23850 · CVE Program
- CVE-2026-23850 · NVD
- FIRST EPSS
- GHSA-cv54-7wv7-qxcw · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences